Paul b



P. R. JORDAN.

VENTILATOR COWL.

APPLICATION man JUNE 3. 1916- 1,325,947. Patentd Dec. 23,1919.

WITNESSES: mmvron;

. entree erases Parana caries.

PAUL R. JORDAN, OF INDIANAPOL IS, INDIANA.

Application filed June 3, 1916.

of the-type that is designed to be used on the top of'a ventilator pipeor conduit or upon a chimney the invention having reference moreparticularly to the type of cowl that is provided with avane to be actedon by air currents for adjusting the cowl. V

object of the invention is to provide animproved cowl of theabove-mentioned character that shall be so constructed as to behi ghlysensitive to air currents in order to be reliably automatic in action toprevent the air currentsentering the ventilator top. I Another object isto provide an improved ventilator cowl of simple and inexpensiveconstruction which shall be reliable, strong and durable in use.

A further object is to provide a ventilator cowl of improvedconstruction that may be rapidly manufactured without requiringexpensive machine work or accurately fitted parts, an aim being toenable theworkman to readily. balance the cowl structure after securingthe various parts thereof together.

With the above-mentioned and other objects in view, the inventionconsists in an improved adjustable cowl or hood provided with animprovedvane or tail piece for controlling the position of the cowl or hood withrespect to the air currents, the invention including improved means forbalancing the weight of the vane or tail piece; and the inventionconsists also further in the novel parts and combinations andarrangements of parts as hereinafter particularly described and furtherdefined in the accompanying claims. y) 7 Referring to the drawings,Figure 1 is a side elevatlon of the improved ventilator cowl or hood;Fig.2 is a top plan of the improved cowl or hood; Fig. 3 is afraginentary section on theline A A of Fig. 2 on an enlarged scale; Fig.4 is a vertical section of the cowl or hood on the plane of line A A ofFig. 2; Fig; 5 is a horizontal sectionon the line B B of Fig.1; Fig. 6is a Specification of Letters Patent.

r VENTILA'IOR-COWL.

Patented Dec. 23, 1919. Serial No. 101,491.

fragmentary sectional elevation approximately on the line C C of Fig. 5;Fig. 7 1s a front view of a balancing weight preferably forming a partof the improved cowl or hood, and Fig. 8 is a fragmentary sectlonalelevation on the line D D of Fig. 4 on an enlarged scale.

On the different figures of the drawings corresponding referencecharacters refer to like elements or features of construction hereinreferred to in detail.

A practical embodiment of the invention may be variously adapted to besupported on the bulldmg that is to be equipped with the cowl or hood,the base portion of the cowl inthe present case being illustrated asbemg supported directly upon the roof 1 of a barn and therefore, a base2 is provided which is adapted to be readily fitted to the roof whererequired. The base has a shoulder 3 from which a neck a extends, thelatter preferably having an external bead 5. The

base and its neck comprises a duct, and the improved cowl structureincludes a tubular base section 6 which is connected to the neck 41.Preferably the base 2 is provided with braces 7secured to the shoulder 3and the neck 4:, the braces extending upward against the exterior of thebase section 6. Cross bars 8 and 9 are secured to the inner side of thetubular section 6 and vertically support a pivotal shaft 10, the shaftbeing secured to the cross bars, preferably by means of set-screws 11and 12. The hood part of the improved structure is elbow-shaped so astohave a vertical portion 13 and a horizontally disposed portion 14, thevertical portion having an open lower end 15 that is placed over theupper portion of the base sections 6, the portion 14: having an open end16 for the escape of the air from the building. v

The hood part is provided with an improved bearing appliance whichcomprises a socket having a base 17 and a cylindrical wall 18', the basebeing suitably secured on the inner side of the top portion of the hood.Suitable filling 19, such as utty, preferably is placed against the base1 and preferably a glass bearing plate 20 is placed against the filling,after which a guide tube 21 is inserted into the-socket and secured tothe wall portion l8thereof and receives the upper portion of the shaft10 which supports the base of the socket and more directly supports thebearing plate 20, the latter being preferably applied for permitting thehood to freely rotate on the shaft. The socket preferably is secured tothe portion 14 of the hood by means of a rivet 22 that extends throughthe base 17. The lower portion of the hood is guided by means of a guidebar 23 that is secured to the inside of the portion 13 and is rotatablyguided on the shaft 10, the shaft being provided with a stop pin 24above the guide bar to prevent the hood from being blown off of theshaft, but permitting the hood to freely rotate on the shaft.

The improved vane or tail piece cons prises a blade 25 that is providedwith a base flange 26 which is fixedly secured on the top of the portion14 of the hood and extends outward beyond the open end 16, the bladeextending also upward so as to be exposed to the air currents above thehood. The normal rearward end of the blade has two outwardly extendingtail portions 27 and 28 thereon that extend divergently each to theother and preferably are curved so as to have concave outer faces.Preferably also the vane has two terminal portions 29 and 30 which areconnected to the portions 27 and 28 respectively, and extendconvergently rearward and together form a vertical blade portion 31, theportions 29 and 30 preferably being curved so as to have concave outerfaces. The tail end of the vane is thus adapted to be very sensitive tolight winds and also to be quickly affected when the direction of theair currents change. Two braces 32 and 33 are secured to the oppositeportions respectively of the hood part, being secured to the portion 14,and extend upward at an inclination and convergently to the oppositesides of the vane and are secured to the upper portion of the blade 25.

For the purpose of conveniently and cheaply balancing the weight of thevane, a rod 34: is secured to the normal forward portions of the hoodand the vane blade, the rod preferably being flat and extending forwarda suitable distance. A brace 35 is secured to the portion 13 of the hoodand also to the under side of the rod and has a flexible crook portion36 thereon, a similar crook 37 reversedly arranged being secured on thetop of the rod, and a balancing weight 38 which preferably is sphericalis placed on the rod, the weight having an aperture 39 adapted toreceive the rod. The weight is of such size that it should approximatelybalance the hood on the supporting shaft 10 when placed against thecrooks 36* and 37, but owing to the rough nature of the parts of thestructure which may affect the balancing of the weights, the weight 38may require adjustment after being placed in pos tion, in which case thecrooks are bent elther backward or forward until the weight,

when in contact with the crooks, accurately balance the cowl or hoodstructure, after which the rod 3a is twisted beyond the weight so as toform a stop a0 to hold the weight in proper position. The end portion ofthe rod 3% together with the weight and the brace 35 with the crooksconstitute also a plainly-visible pointer to indicate to observers thedirection of the wind currents.

In practical use, the structurally unbalanced cowl or hood having beenaccurately balanced on the supporting shaft is extremely sensitive tothe actions of the air currents, and therefore the ventilation is mosteffectively accomplished regardless of the shifting winds, and rain andsnow are prevented from being driven into the open end of the cowl tocause deterioration of the metal thereof. In case the air is calm sothat the cowl becomes stationary and the wind subsequently rises, thevane is promptly affected by the air current so as to properly turn thecowl on its pivot if not in the required position. In case the windblows toward the terminal edge 31 the force of the air current will inall prob-' ability be exerted to a slightly greater degree on either oneor the other portions 29 or 30 and accordingly turn the cowl around sothat the portions 27 and 28 shall be exposed to the currents; and incase the rising wind strikes either the portions 27 or 28, the vaneobviously will be quickly acted upon as will be the case when the windstrikes either the portion 29 or the portion 30. r

Having thus describedthe invention, What is claimed as new is 1. In aventilator cowl, the combination of a hood, a vane secured to the hoodand having a terminal portion comprising four upright relatively angularouter faces beyond the hood, a separate flexible rod secured to the hoodand having a twisted-portion at a distance from the hood, a bracesecured to the hood and to the rod, and a weight device having anaperture receiving the rod between the twisted portion thereof and thebrace and secured thereby in position on the rod.

2. In a ventilator cowl, the combination of a hood, a vane having a basesecuredto the top portion of the hood and extending beyond one side ofthe hood, the terminal portion of the vane having four uprightrelatively angular outer faces, a separate flexible rod connected withthe vane and secured to the hood, the rod having a twisted portion, aweight device having an aperture receiving the rod, one side of thedevice being agalnst said twisted portion, a brace secured to the hoodand also to the under side of said rod and having a flexible portionengaging the opposite side of said device, and a stop device secured tothe upvergent from the divergent faces respectively.

4:. In a ventilator cowl, the combination of a rotatably supported hood,and a vane secured to the hood, the terminal of the vane having fourdifferent faces and comprising two portions that extend divergently eachfrom the other from the body of the vane and two portions that extendconvergently each to the other from the divergent portions and areconnected together.

In testimony whereof, I aflix my signature in presence of two witnesses.

PAUL R. JORDAN. Witnesses: a

E. T. Smvrcrs, J. H. GARDNER.

